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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6779bc04a38d4ad3acdcf01556b70b0ea8d38b44b53a5aca2d98fda0acaafbfe' 
  AND token = 'D+2uDFd2+ag2pw3xuUa9GUp1c33YWXw5geaAB0qi+2A=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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