SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '95f029bedd9fd75ae2534c38229cb5506e9a7abb77ee520b1a4f28b0e1147986' 
  AND token = 'KJBLaDKqR5zyTwKiP1T/SoRGmjzxcaUCV1J6ECgZFB4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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