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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bd6cfd5ec6bc2d60373170bffdf598f769c45a166cd79ce14944dcc03b719184' 
  AND token = 'QnwD7isksHzTWm6Ugk/E9l6Z2qdQ7MjmNvfnZo4DuV8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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