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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '08f5905f7a6b67879c52ec535b10ab64c3ce96ef08b7a0d359a6f98f4546565b' 
  AND token = 'CjK/Ncxn/QPeg4bLiIEdw/WSgZi5WBXEH18V5Z3lKFE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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