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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '59018576d2318a423013e38824612297f294e842399889fccc1eddbe698b651c' 
  AND token = 'WeyV9w3J5XVR+4Ppyte38+q1KK4Iv6b53lRutK7ykzY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}