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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '62a156ae07e075ce276e98df83b96c52571caa838aab2f6052caa2f688a1ee09' 
  AND token = 'fusAolu5WLuEun6S07PDTwELG6VzvfPl5J8uRfev/tw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

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