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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0c1cb1c9ca52fc5d67f944cf206a83135acdea57d2c31c4d22836b5cb7490b9c' 
  AND token = 'VDGswFRwV/ku9yMZFer87k/9j9ZZM/XfVqn04O/qrgU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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