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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'ba322d2b3863d67819d90efa18ddefe5114ecf251d3bd10d33e37d1c92fd0754' 
  AND token = 'StGtHD+4VAL4qNfRhx/8YBswtOX721Fbw6QP3Gl3o1U=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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