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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '153463ee2c7ae4c0ecf4f6d9c5931cbafc53d4eac62c994b06c5574af83cc91d' 
  AND token = 'ZPp6J4QBryQqcr12e2BGzS4JTB74KzoU5F+yuObUKzY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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