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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '130ede9fb49c391614f1f3f0a1006d513e9f02623825f6331c6565850aa7b132' 
  AND token = 'NgwwAUstnnd5ly0/BacBq60tAAKfHinApUYK9Dldb6A=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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