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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '63564e9103064c54f918bb5836bd1cb7e16e46846428408da16aa55ee7a72226' 
  AND token = 'V1kjMA2k6CjffXw/yrToyEq+rXKuAnJ0Hw85GO2fcb8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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