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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '7e25f0ef55ec14ca7f52c9bf084dcc46a18fca9cbfdab2de664342dc5c7eb724' 
  AND token = 'x2F75QJXltoL/s1VKEgItXzFvfb2T2jsZIhglU5zFLI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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