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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '6d09ff030e626dc1be6f000f005faf8fe3881ba57ca9c16253557fbe55701acb' 
  AND token = 'vDyJuxs68DX8lTaU8S5o40LHPBJy/IT1cF0gEQkr7Cg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

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