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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '6679a5707250731c08fbb201d6fe665e61beecbf0b4b0786c7179fe9cb4f43e6' 
  AND token = 'ERd8RbqXJbSoxtxfJ+gQRft3JaLXRefXCqnVIig/toA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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