SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '60d27726b0d3a204c6dcc0b70a4e3e7db239c2fbc4115d562fcca197716e46e1' 
  AND token = 'z/H5PkEAIMADf6TfGhicw5ipY+8oKJq9OFYX0tVm8ao=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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