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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'ed8a00be191e3cbbc9d50a9c9dbc05bfbc8f4fbacdb4c23b0c80df0bdb2dfc7d' 
  AND token = '17BqSVl4XieAknsRnKupmu5C7a4xXxfarTvKnBwGolY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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