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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '084e2c50a90cdca9df40071b5721d6ae1e86d5b3be3ac115242bb730c6745401' 
  AND token = '1fR65zXS54oVmHpbJ1gjGkDXe0bYjMGrtnEKs6h4Voc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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