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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '8815e3c07c85d68cae95cf1433a9a328110d9cfad1808c7aec088125fe2c8388' 
  AND token = 'Jo+vzlM/PRScmGdhu3bUy9s5raBnQglyPwc62N5n1ZM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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