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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '7a192a4c2c6f73eb6dacd183b1faef1d991a3cf32372d01f59869dad1d9f040c' 
  AND token = 'Zc2ryusexrcT4xW3yClmZBjZe8BJI9MEzyI67O3D+Fs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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