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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '8e6ee0dc35d7025f34eba5b162dd9fefadcbfa26b2229e62414ecac0abde71c7' 
  AND token = 'DuROBJVJoBqYAy6ggD8Xii3RBdxUXkUUwZaLICt6+SM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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