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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'f8feea0f51740d640defa1f32b8ae0c83c422a3db3bb9bf4b85593f927eb82e0' 
  AND token = 'f/iN6rkTuuncR/dMqwuxzLes2gVqRdU0TE/+iC5Movk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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