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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '108b1d1e2cd079310f43db8fa628561c85c139c7910a427ddb087629e396e5dd' 
  AND token = 'CNt0S9/BBgNVZ9suswbRm29kAWUvhG+18la5KpdbQuU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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