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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '13e195e424b552e7e4fc9c4b7c49c7007567fbd86def2e8c9f8b06d965f2b13d' 
  AND token = 'pWF6s2Q9aEmopLWCDztP6zaKzoGTfnk0eIzlG1r7iKs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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