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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '682b73dd0e72294ab0f5b908e707acf6cdaa659d31e9e7c7349035d1c9c31cfd' 
  AND token = 'ee9MwWuuqQdapAQmRS370FjeqV6W6tzzPtqZf/oC+Do=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

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