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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '095ea41a50128a4eb414be3da1bbff8ca038314050910585b58c9b1c8dc1af9c' 
  AND token = 'qznm77sAol1qBK1uNNN1u3sW/OpdP/r+SyO3RWSBWhc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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