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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a2bc0b6e7c6cad9f9c9f7ae1e4acd962665adf5e8d12a58d14efec9de13b5a5b' 
  AND token = '9vEp+8n3a8kkhXsAtt/4/IhWO7F+6OIL9Xok7IENrfg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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