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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f23df095b80446351745056fbc5cde986f30c38808bece12ea527dfc5a6f8a35' 
  AND token = 'NN7Tp/xmmX8y7lvk5o4eB1kL9ubUva0+W9a3oR+3K3E=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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