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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'e73f4f27e05a425e4a1540d5ae9bd6e1e97f25ab33661825f32e2ac37bbce89a' 
  AND token = 'OBYF1kYDQeKlzT/0xRCEY2dTdmO7sYceoMDV6nge4P8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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