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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'aed20b655e79b78fdd1b341aca0d7f689870f7fb00ce256b1bd4b81cd2ce7f20' 
  AND token = 'FZ4bHkOXATdP6vS7uNE61gF2Ai5M+LIWz9tK+FKMES4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}