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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'fb70fb0755dbe6fbb904a357bee29f00389a78c12c7c5fb98b267ddfb8a6eace' 
  AND token = '9Qu002tKNNZMfQPelZodu2G6lMjeJkIgruk6PyVSSuw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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