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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6a010b228c969dcc8b063a92f56b7600a4b496a018b6e3627d379a34ae5663c3' 
  AND token = 'Wm7kJ0NLTJB1UXJrdxuBcRPUU52BwHt3LhlqU8xMSrE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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