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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9dd10381ac5ca018debeb7293b6787b7192e93ae1e3bbcae39c9d0f65d1e73bf' 
  AND token = 'k9IFFlaJvBWwlB5FAM//R3Lpu+clthesJnh1l+6ytwY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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