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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'b60631c5d8f9d8ddf5b860ba8950517aabcf54edccb9558e8409420306d8ee51' 
  AND token = 'ty+MAw0EbUr33/xglfo+UUagjEu6A+xMrZ8UpSOgU5w=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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