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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '77980fac55ad294179651bd503e5578ec6c9f70cb987f734a6bafd397fc332a5' 
  AND token = 'RIiwcpZ6KdMP/LmW/9e3yH95E44aQ/RgCgr5UaUkLEE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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