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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '80172a1cf0dcab88aa1ceaa9709ec5e49f5e377a2e8f85ad545d210988a81db5' 
  AND token = 'Y90QGr5/IWOBUFX3Pg+ULS40yLsahoj7UNMZXO4xa28=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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