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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c658ce2639df761a36a11bcef346a57c141232c4cc3f2433948837237ea149ab' 
  AND token = 'Pqsiju5jbTMnp3Ws9xsWuRxcpGPOMlNYFB2Ta3CRR4o=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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