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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '23e24a79a72e931e9cfa1e75b7c9ac196678220ac9f91e56530046fc40d2f5e6' 
  AND token = 'n19G15JrpVBft4Ko8yTqOvC4M13k/tYZilUTptNFRvM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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