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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '0faa69e040f63b2c7881495a5ffb7f394f6ac3f4a853c5c945ab7934533702ff' 
  AND token = 'hAfTfktowY23IkJJLotQiM4YcL+PWT4G2h2XIM1aKMA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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