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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'd030b348f9f125b0506eb24cf88b19699020ef2d6efea743ab38697b5c081cf3' 
  AND token = 'q1gA5qu+S0eOp9kCfj4+KfK2nXq8uMal+YHEOJGc0xc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00061

JSON explain

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