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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1caa8e60195ea2835b4df6448c3fcc0033006cc2d49605b1c5e5de616e084cd7' 
  AND token = 'G5pzOeodReAg3+SrG+ZBO65H7Zrv6f6OqG+fdsvZ05E=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00015

JSON explain

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