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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'beafef2d1ba08a5422c75035cfb3da224a5dc16c627b01b2e480a73284cc2fbc' 
  AND token = '2bMC+B+saBlZ6TB6I7gLHowjfnKfHI2FmZQcx84jBbY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00061

JSON explain

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