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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'fc270818cd22c410b794f269b38873b7e1243401cbe59d8b775984a997c3eb51' 
  AND token = 'rpbG95IpKg7M3B7B0Aq8t1qRX0wnyYy/PEvBkeTgYCI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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