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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c73ebfd34bb79cdac84770030df3e44dc220f691ae8d0f5b6cb88bdda266de21' 
  AND token = 'FQscrcikDA+ZO15XwsP2eC0L6u/so6kFWr4DK+cYpn8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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