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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'df2167f026c7ecf505cdac545ed2edcb2bd00abda8c126e41acd30a1bc6756a3' 
  AND token = 'q5Z0DFYoLlM2doUunfAyGn6FuMlK/YE41w+3N79FbwQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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