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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7d7b76b392dcc78ed8ee17263dc0193d1ab3db9b4a9b3a1bbd70b0bb26d16a94' 
  AND token = 'pQI2UgAJpr5J7uMfzRz00mHUObrJvgj3vhpTWPB55Co=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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