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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'ff3b644baf6de0295fdd13db3e03a230d16cddca64fa8cfdc05ea93f7517d929' 
  AND token = 'E858kJ5FoiS3dBkl6JLmOHqTlsoxiYohPEx5fu0D4NU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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