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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7ce1c6e3bbde33ef01141fc62b78e1cb7e14b8f5c4436bde760a90581f270329' 
  AND token = 'Y02o9YUHHVjucZcOniUcAWaAslw6DfbU2obBsfq6cDE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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