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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '20e073151a60f1c1c089545124590e3c9e1b698bbf6a37d0b38d14cfd6e336dc' 
  AND token = 'Yoaszrl42d3CZjxHVDsiFfem/z/NsixNHJIKQSuzRes=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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