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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '55c28a4e24909280f712431d3b43bd789684af7465d621a37c89e9516ed38919' 
  AND token = '1oCAiV8dQ81zVO+u9jMcNuRZEJ/DpyAMz5H4CVMW7NI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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