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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '08997a7ff77018025f7c727055d5a863ed3402282c58617ae73326ba7ef8d1cc' 
  AND token = 'r5n0Vn+ByDaclB0E4GHbbVCxNbTopVH33i7l8FFWVks=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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