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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c7a61f8b2edf2a139b4647fc688b0a6713f67e068611dc115e8876ac17f5c1e3' 
  AND token = 'UXW5HnLIUmrL6X0lT3xKoSMBzjFsRpBXtKUX5RsreOE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00090

JSON explain

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