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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '97f0103beb082caf43f8dfc6880f671a63d31eca81e78ef33e938c6ec549e657' 
  AND token = 'M7v3EvwnYwmkOoIf4JT9uk3DX5939w6WcKZ6b0l490o=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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