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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '22a382e9d4c7f84256b0da021e487d9f04753122aae77ed749fd5f08d8df41bd' 
  AND token = 'xUgzQy8lzrtdlgblkBc8OEXO0ePhRZYBVCN2LsiryQI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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