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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '06d1797e24daaec216347a17a6cb8fbfc16de9487d91d01525692480d8257951' 
  AND token = 'D575UajKjDDl60enwP0QiWOUNhGAYU6fb31VwRnnCFk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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