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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '55ee4f7b3b5ef767502bb9df30bc37732443aa0680b6e3631cc928a167c902db' 
  AND token = 'HoT5V3Bo0kt5rvoD6LSUAwftftSrLMuPfSFJDYZFRO0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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