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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1bf48961432147605d0c0141a89e46a15629497e60b9ebc6c026c66b9d210761' 
  AND token = 'V1wJymgNCC8BXR+vm/hJOhVahQ6aehh98kEor7CIVjg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00044

JSON explain

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