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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '5e25adcca00f52c96653d072ca2de70ad8cf7cefc8afebe7389117d6d7dcebd3' 
  AND token = 'ahSbvbd6S+TUahWJrsCiu8hK4oM5N9PgmllEmBBCuuo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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