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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5437574e5a8b346e6034d3818506c06b9f303bdeafa3a9e1e47d13ac3b514b44' 
  AND token = 'Yd44tW1Vg56t9PYAt9499xPSHlbJAgn+p+DdkPlO2U8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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