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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'cb01d351a416087038da6f3683b38f1e899230bc47c88ce145f1b155e29d1d13' 
  AND token = 'zFPBp2M5uY8L1gn3ptU8e/QBScBKBbB+jwGhb6lS5uk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00048

JSON explain

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