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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'edd77634d53233e2ec4a4319f7b0f343103f4db1802469d8905fc0fa5ff3cd72' 
  AND token = 'Wn0VyMg1swITBLdKf3d3WGeYHbmg8WZ1JXN3fOu3lnU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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