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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '51c1580c24eb5dd9a147a00e5af4c598cf6a983998ccc1dd7f30a760961a13ef' 
  AND token = 'n0R5XfC3qh4bvoytVJzgyA8eIn+OZL5hsV2L+t4bE7U=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00073

JSON explain

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