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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd66952ab7439ad842c7446abdd108ede32a40ce877f02bc07f35206774cddf2e' 
  AND token = 'Sv1GltFVA/Gm2aa907Q3jV/Gwm8+Lz4CAIxCsAZi44U=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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